GB2421350B - Copy protection for optical discs - Google Patents

Copy protection for optical discs

Info

Publication number
GB2421350B
GB2421350B GB0525776A GB0525776A GB2421350B GB 2421350 B GB2421350 B GB 2421350B GB 0525776 A GB0525776 A GB 0525776A GB 0525776 A GB0525776 A GB 0525776A GB 2421350 B GB2421350 B GB 2421350B
Authority
GB
United Kingdom
Prior art keywords
optical discs
copy protection
copy
protection
discs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0525776A
Other versions
GB2421350A (en
GB0525776D0 (en
Inventor
William Henry Christophe Doyle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rovi Solutions Ltd
Original Assignee
Macrovision Europe Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Macrovision Europe Ltd filed Critical Macrovision Europe Ltd
Publication of GB0525776D0 publication Critical patent/GB0525776D0/en
Publication of GB2421350A publication Critical patent/GB2421350A/en
Application granted granted Critical
Publication of GB2421350B publication Critical patent/GB2421350B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0092—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • G11B20/00927—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches
    • G11B20/00949—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches said intentional errors occurring due to bad sectors, which are either physically destroyed or which are declared defective in the defect management information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00166—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
    • G11B20/00173—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software wherein the origin of the content is checked, e.g. determining whether the content has originally been retrieved from a legal disc copy or another trusted source
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00579—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the data encoding, e.g., modulation schemes violating run-length constraints, causing excessive DC content, or involving uncommon codewords or sync patterns
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • G11B2020/1457—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof wherein DC control is performed by calculating a digital sum value [DSV]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/213—Read-only discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
GB0525776A 2004-12-20 2005-12-19 Copy protection for optical discs Expired - Fee Related GB2421350B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/018,105 US20060136729A1 (en) 2004-12-20 2004-12-20 Copy protection for optical discs

Publications (3)

Publication Number Publication Date
GB0525776D0 GB0525776D0 (en) 2006-01-25
GB2421350A GB2421350A (en) 2006-06-21
GB2421350B true GB2421350B (en) 2007-05-02

Family

ID=35697105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0525776A Expired - Fee Related GB2421350B (en) 2004-12-20 2005-12-19 Copy protection for optical discs

Country Status (3)

Country Link
US (1) US20060136729A1 (en)
GB (1) GB2421350B (en)
WO (1) WO2006067405A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9313248B2 (en) * 2006-04-13 2016-04-12 Johnny Stuart Epstein Method and apparatus for delivering encoded content
GB2449647B (en) 2007-05-29 2010-01-13 Fortium Technologies Ltd Optical discs
GB2457482B (en) * 2008-02-14 2012-10-03 Fortium Technologys Ltd Copy protection system for optical discs
KR101698211B1 (en) 2010-05-07 2017-01-19 삼성전자주식회사 Method for authenticating a storage device, machine-readable storage medium and host device
CN102279919A (en) * 2010-06-13 2011-12-14 中兴通讯股份有限公司 High-frequency card screening and repairing method and reader

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998052114A1 (en) * 1997-05-16 1998-11-19 Imation Corp. Arrangement for preventing use of unauthorized duplicates of a data storage medium using subcode and method therefor
WO1998052194A1 (en) * 1997-05-16 1998-11-19 Imation Corp. Arrangement and method for preventing use of unauthorized duplicates of data storage media using address information
US6104679A (en) * 1998-10-01 2000-08-15 T.T.R. Technologies Ltd. Method for determining an unauthorized copy of an optical disc
WO2003019552A1 (en) * 2001-08-22 2003-03-06 Brainshield Technologies, Inc. Copy protection device
WO2004012190A1 (en) * 2002-07-30 2004-02-05 Sony Corporation Data recording method and device
WO2004066294A1 (en) * 2003-01-24 2004-08-05 Macrovision Europe Limited The copy protection of optical discs

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5999505A (en) * 1993-03-26 1999-12-07 Sony Corporation Information processing device for continuously and discontinuously processing recorded data and recording medium therefor
US5621743A (en) * 1994-02-18 1997-04-15 Sanyo Electric Co., Ltd. CD-ROM decoder for correcting errors in header data
TW316976B (en) * 1995-05-16 1997-10-01 Sony Co Ltd
EP1227482B1 (en) * 1997-05-30 2005-08-17 Macrovision Europe Limited Method for copy protecting a record carrier with a pattern of logical errors
US6424615B1 (en) * 1997-12-24 2002-07-23 Yamaha Corporation Optical disk having plurality of volumes, recording device and reproduction device for same
US6259659B1 (en) * 1998-12-11 2001-07-10 Lsi Logic Corporation Method and apparatus for configuring a sector map for an optical storage device
WO2000079532A1 (en) * 1999-06-23 2000-12-28 Mitsubishi Chemical Corporation Recording medium, method for initializing recording medium, encrypting method and device for recording medium, decrypting method, and acoustic/video/data device
KR100716769B1 (en) * 1999-11-16 2007-05-14 소니 가부시끼 가이샤 Recording medium, data recording method and apparatus, data reproducing method and apparatus, and copying control method
IL133236A0 (en) * 1999-11-30 2001-03-19 Ttr Technologies Ltd Copy-protected digital audio compact disc and method and system for producing same
US6687871B2 (en) * 2000-06-16 2004-02-03 Samsung Electronics Co., Ltd. Digital signal processing apparatus for reproducing optical disc data and optical disc player having the same
BR0112805A (en) * 2000-07-28 2003-07-01 Macrovision Europ Ltd Copy protection for optical discs
JP2002329367A (en) * 2001-04-27 2002-11-15 Sony Corp Data recording method and device, data reproducing method and device as well as data recording medium

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998052114A1 (en) * 1997-05-16 1998-11-19 Imation Corp. Arrangement for preventing use of unauthorized duplicates of a data storage medium using subcode and method therefor
WO1998052194A1 (en) * 1997-05-16 1998-11-19 Imation Corp. Arrangement and method for preventing use of unauthorized duplicates of data storage media using address information
US6104679A (en) * 1998-10-01 2000-08-15 T.T.R. Technologies Ltd. Method for determining an unauthorized copy of an optical disc
WO2003019552A1 (en) * 2001-08-22 2003-03-06 Brainshield Technologies, Inc. Copy protection device
US20050027996A1 (en) * 2001-08-22 2005-02-03 Erland Wittkoter Device for copy protection
WO2004012190A1 (en) * 2002-07-30 2004-02-05 Sony Corporation Data recording method and device
EP1526532A1 (en) * 2002-07-30 2005-04-27 Sony Corporation Data recording method and device
WO2004066294A1 (en) * 2003-01-24 2004-08-05 Macrovision Europe Limited The copy protection of optical discs

Also Published As

Publication number Publication date
GB2421350A (en) 2006-06-21
US20060136729A1 (en) 2006-06-22
WO2006067405A1 (en) 2006-06-29
GB0525776D0 (en) 2006-01-25

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20110217 AND 20110223

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20161219